[Python-Dev] Emit SyntaxWarning on unrecognized backslash escapes? (original) (raw)

Ethan Furman ethan at stoneleaf.us
Tue Feb 24 18:46:50 CET 2015

On 02/24/2015 09:18 AM, Thomas Wouters wrote:

On Tue, Feb 24, 2015 at 5:37 PM, Ethan Furman wrote:

- M.A.Lemburg's idea of changing the exception message in key places to make a successful backslash replace obvious (FileNotFoundError: [Errno 2] No such file or directory: 'c:[\t]est.txt' - warning: embedded escapes) Any ideas on how this check could be implemented? How would it distinguish \t from an actual tab in the string literal, or "C:\x64-python" from "C:\d-python"...?

--> 'a tab' 'a\ttab' --> 'a\ttab' 'a\ttab'

So the phrase "embedded escapes" may not always be accurate, but will be something to search on, and will help explain what is being seen.

-- Ethan

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